478 



At present the following facts may be consider'id to be 

 established : — 



(l). Thyridaria lurda is the cause of the "die-back" disease of the 

 cacao plant and of the " brown rot " of cacao pods. Its Diplodia 

 form is identical with the Diplodia which is known to cause a "die- 

 back " disease of Para rubber in the Straits Settlements and Federa- 

 ted Malay States. The fungus also attacks mango, papaw, 

 Castilloa, rubber, sugarcane and Albizzia moluccana, and is considered 

 to cause a root disease of coconut in Trinidad. 



{2). It occurs in the West Indies, tropical America, tropical 

 Africa, the Philippines, Ceylon {?), Java. Samoa, St. Thome 

 and the Malay Peninsula. 



(3). It is a wound parasite, and the disease is caused by the 

 fungus when it is in its Diplodia stage. The Diplodia 

 condition is capable of reproducing itself and passes on 

 the dead parts into the ascigerous {Thyridaria) condition 

 some time after they are dead. 



The following references are appended : — 



i8q2. Patouillard. —Bulletin de la Societe mycologique de 

 France, p. 136. 



1894. Prilleux & Delacroix.— Bulletin de la Societe mycolo- 

 gique de France, p. 165, t.vi, fig c. 



1896. Hennings. -Fungi Camerunenses ; Engler Bot. J;dirb., 

 xxii, p. 172. 



1901. Howard.— West India Bulletin, Vol. II, p. 203. 



1906. Appel & Laubert.— Arb. aus der Kaiserl. Biol. Ansl, 

 fur Land and Fortswirts, p. 147. 1906. 



1909. Griffon & Maublanc— Bulletin de la Societe Mycolo- 



gique de France, xxv, p. 51. 



1910. Petch.— Circulars and Agricultural Journal, Royal 



Botanic Gardens, Ceylon, iv, No. 23. 



A BACTERIAL DISEASE OF POTATO AND 

 TOMATO. 



By Keith Bancroft, b.a. 

 Assistant Mycologist, F. M. IS. 



Specimens of potato plants have been recently received from Tai- 

 ping (Perak) exhibiting the well-known " bacteriosis " caused by Bacil- 

 his Solaiuifcanim, \\. Smith. The same disease has been known for two 

 or three years to occin in Kuala Lumpur on tomato plants cultivated 

 m vegetable garden 1 hcse two crops are but little cultivated in the 



